Give your starter a hand by installing these in your high-compression, big-inch motor. These need to be installed by an experienced mechanic/machinist.
Specifications
- Can be installed in all Big Twin, XL and Buell motors
- Fits dual-plug heads or heads that have been machined for dual plugs
- Requires a 10mm × 1.0mm drilled and tapped hole in your cylinder head for use.
- Made in USA.
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